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Request body validation in Node with yup | validating JSON schema
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Learn how to validate the request body of incoming HTTP requests and return proper errors if the request body is incomplete or does not meet our expectations. We will use the joi library to validate our incoming requests. This is episode 1 of our series in which we are setting up an example project.
00:00 Why do we need to validate request body validation
01:20 creating a Node project with npm
02:50 creating a simple express server with one endpoint
06:22 testing our server with Postman
08:03 how to validate a request body
08:50 defining the format of the request body with yup
12:00 creating a request body validation middleware
15:53 defining expected API errors
17:32 creating an error handling middleware
20:56 plugging our DTO validation middleware into our router
21:43 testing our request validation with Postman
23:45 yup caveats: applying default values to the request body
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